127801245049 has 15 divisors (see below), whose sum is σ = 135898588587. Its totient is φ = 120186286656.

The previous prime is 127801245037. The next prime is 127801245053. The reversal of 127801245049 is 940542108721.

The square root of 127801245049 is 357493.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 686178025 + 127115067024 = 26195^2 + 356532^2 .

It is not a de Polignac number, because 127801245049 - 2¹⁷ = 127801113977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127801244996 and 127801245014.

It is not an unprimeable number, because it can be changed into a prime (127801248049) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 103314859 + ... + 103316095.

Almost surely, 2^127801245049 is an apocalyptic number.

127801245049 is the 357493-rd square number.

127801245049 is the 178747-th centered octagonal number.

It is an amenable number.

127801245049 is a deficient number, since it is larger than the sum of its proper divisors (8097343538).

127801245049 is an frugal number, since it uses more digits than its factorization.

127801245049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 127801245049 in words is "one hundred twenty-seven billion, eight hundred one million, two hundred forty-five thousand, forty-nine".